diff --git a/lib/Doctrine/Persistence/AbstractManagerRegistry.php b/lib/Doctrine/Persistence/AbstractManagerRegistry.php
index 63ff9b02..af269aff 100644
--- a/lib/Doctrine/Persistence/AbstractManagerRegistry.php
+++ b/lib/Doctrine/Persistence/AbstractManagerRegistry.php
@@ -2,6 +2,7 @@
 
 namespace Doctrine\Persistence;
 
+use Doctrine\Persistence\Mapping\MappingException;
 use InvalidArgumentException;
 use ReflectionClass;
 
@@ -176,12 +177,23 @@ public function getManagerForClass($class)
             $class = $parentClass->getName();
         }
 
+        $isInterface = $proxyClass->isInterface();
+
         foreach ($this->managers as $id) {
             $manager = $this->getService($id);
 
-            if (! $manager->getMetadataFactory()->isTransient($class)) {
+            if (! $isInterface && ! $manager->getMetadataFactory()->isTransient($class)) {
                 return $manager;
             }
+
+            if ($isInterface) {
+                try {
+                    $manager->getClassMetadata($class);
+
+                    return $manager;
+                } catch (MappingException $expected) {
+                }
+            }
         }
 
         return null;